// https://syzkaller.appspot.com/bug?id=a73e7bdd1fe09499f1ff553b4374c18870c98d8f
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$tun arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x20a02 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x2000000000c0, "/dev/net/tun\000", 13);
  res = syscall(
      __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x2000000000c0ul,
      /*flags=O_TRUNC|O_NONBLOCK|O_NOFOLLOW|O_RDWR*/ 0x20a02, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/3);
  //  socket$pppl2tp arguments: [
  //    domain: const = 0x18 (8 bytes)
  //    type: const = 0x1 (8 bytes)
  //    proto: const = 0x1 (4 bytes)
  //  ]
  //  returns sock_pppl2tp
  res = syscall(__NR_socket, /*domain=*/0x18ul, /*type=*/1ul, /*proto=*/1);
  if (res != -1)
    r[1] = res;
  //  socket$inet6_udp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: const = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_udp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/2ul, /*proto=*/0);
  if (res != -1)
    r[2] = res;
  //  connect$pppl2tp arguments: [
  //    fd: sock_pppl2tp (resource)
  //    addr: ptr[in, sockaddr_pppl2tp] {
  //      union sockaddr_pppl2tp {
  //        pppol2tpv3: sockaddr_pppl2tp_t[pppol2tpv3_addr] {
  //          sa_family: const = 0x18 (2 bytes)
  //          sa_protocol: const = 0x1 (4 bytes)
  //          addr: pppol2tp_addr_t[int32] {
  //            pid: const = 0x3 (4 bytes)
  //            fd: sock (resource)
  //            addr: sockaddr_in {
  //              family: const = 0x2 (2 bytes)
  //              port: int16be = 0x4e23 (2 bytes)
  //              addr: union ipv4_addr {
  //                broadcast: const = 0xffffffff (4 bytes)
  //              }
  //              pad = 0x0 (8 bytes)
  //            }
  //            s_tunnel: int32 = 0x2 (4 bytes)
  //            s_session: int32 = 0x0 (4 bytes)
  //            d_tunnel: int32 = 0x2 (4 bytes)
  //            d_session: int32 = 0x0 (4 bytes)
  //          }
  //        }
  //      }
  //    }
  //    addrlen: len = 0x2e (8 bytes)
  //  ]
  *(uint16_t*)0x200000000740 = 0x18;
  *(uint32_t*)0x200000000742 = 1;
  *(uint32_t*)0x200000000746 = 3;
  *(uint32_t*)0x20000000074a = r[2];
  *(uint16_t*)0x20000000074e = 2;
  *(uint16_t*)0x200000000750 = htobe16(0x4e23);
  *(uint32_t*)0x200000000752 = htobe32(-1);
  *(uint32_t*)0x20000000075e = 2;
  *(uint32_t*)0x200000000762 = 0;
  *(uint32_t*)0x200000000766 = 2;
  *(uint32_t*)0x20000000076a = 0;
  syscall(__NR_connect, /*fd=*/r[1], /*addr=*/0x200000000740ul,
          /*addrlen=*/0x2eul);
  //  ioctl$TUNSETIFF arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x400454ca (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca, /*arg=*/0ul);
  //  ioctl$TUNSETDEBUG arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x400454c9 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454c9, /*arg=*/(intptr_t)-1);
  return 0;
}